US1678049A - Fluid-control device - Google Patents

Description

July 24, 1928. 1,678,049

E.J.KEARNEY FLUID CONTROL DEVI CE Filed'May 26, 1926. 3 Sheets-Sheet 1f INVE TOR ATTORNEY July 24, 1928.

E. J. KEARNEY FLUID CONTROL DEVICE Filed May 26, 1926 s Sheets-Sheet 2 Fig.3?!

ATTORNEY July 24, 1928.

E. J. KEARNEY FLUID CONTROL DEVICE Filed May 2e, 1926 5 Shets-Sheet 3 CONTRACTING EXPANDING VARIATION OFCHAMBEBVOLUME mae- Fig.7

m M m CHAMBER i4 CHAMBER 12 }E XPANDI G v cumpzn I3 CHAMBER l5 INVENTOR ATTORNEY Patented July 24, 1928.

UNITED STATES PATENT "OFFICE; f

EDWARD J. KEARNEY, OF

WEST ALLIS, WISCONSIN.

FLUID-CONTROL DEVICE.

Application filed May 26, 1tl26. Serial No. 111,727.

This invention relates to fluid control devices such as pumps and motors and more particularly to improved means for obtaining automatically expanding and contracting chambers communicating at suitable intervals with intake and exhaust ports.

An object of the invention is to provide a fluid control device such as a pump or motor having a multiplicity of expanding and contracting chambers in improved closely organized relation whereby is obtained a fluid pump and motor of large capacity for the space occupied.

A further object is to provide a device in 7 which an expanding and contracting chamber is put into communication with the proper intake and exhaust ports at the proper time withoutthe use of auxiliary valve or port operating mechanism, the efl'ect being obtained by an improved form, relationship and operation of parts.

A further purpose is to provide a fluid control device such as a pump or motor in which rotary movement is caused to automatically expand and contract a chamber without the intermediate agency of eccentrics or cranks.

Another object is to provide'a fluid control device such as a pump or motor having a substantially uniform, non-pulsating flow of fluid, whether used as a pump for delivery of fluid under pressure, or used as a motor to receive fluid under pressure; this being particularly desirable when used in connection with the comparatively -nonelastic fluids such as oil or water although also desirable when used in connection with power elastic fluids such as air or other gas.

Another object is generally to improve.

- and simplify the construction and operation of a device adapted tobe used either as a. fluid pump for the movement of fluid when is applied to operate the device. or as a fluid motor from which power may derived when fluid under pressure is suit-- ably applied to actuate the device.

Other objects will be apparent from the accompanying drawings, description and claims.

The invention consists in certain novel features of construction and arrangement and in the combination of parts as hereinafterparticularly described and claimed.

In the accompanying drawings, the same reference characters. are used to designate the same parts in each of the several views. Fig. 1 is a plan view mainly in section along line 1-1 of-Fig. 2, of a device in which this invention is incorporated.

Fig. 2 is a section along line 22 of Fig. 1.

Figs. 3, 4, 5 and 6 are partial sections of the mechanism shown in Fig. 2.but in which the rotatable elements within the housing are successively at different positions of rotation degrees apart, the movement being in the direction of the arrow and the position with reference to the positions shown in Fig. 3 representing 0, 90, 180, and 270 of movement.

Figs. 3 4 5 and 6 are respectively transverse sections along the lines (Ir-a of Figs. 3,4, 5 and 6.

Figs. 7 and 8 are explanatory dia rams.

A case or housing generally denoted y the numeral 1, is for convenience of assembly constructed in two or more parts, in this instance the two parts or portions2 and 3 secured together by bolts such as bolt 4. A main chamber 5 is provided within the housing and is of substantially spherical interior form.

A shaft 6 rotatably journaled in the housing has fixed upon or integrally formed with its one endv a member 7 havin surfaces in the direction toward shaft 6 which are complementary to and closely but rotatablyfitted to'the spherical interiorsurface of the'chamber End 6 of the shaftfi projects outside housing 1 and carries a pulley 8 oi other 'means of transmitting power either to or r from the shaft 6. Another shaft 9 is rotatably journaled in the housing portion 3 and fixed upon or integral with shaft 9 is a. member 10 having surfaces in the direction of shaft 9 closely butrotatably fitted to the spherical form of thechamber 5, the member 10 being similar to the member 7 but oppositely disposed. The axis of rotation of shaft 6 and member 7 coincides with an axis of the sphere complementary to the interior wall surface of the housing, and the axis of rotation of shaft 9 and .memberlO coincides with-a different axis'of the sphere, the respective axes bein located in a common plane but at an-ang e relativeto' one another and with thediiferent axes of rotation in: tersecting at the center of the sphere. 7

of member 10- 'as is more particularly shown An intermediate member 11 is pivoted for angular movement or oscillatory relative to the member 10 about an axis coinciding with one of the axes of the sphere complementary to the chamber 5, and vertical to the axis of rotation of member 10, by means of a portion 11 socketed in a projecting portion 10 face of the member 11 is of spherical form complementary to the spherical interior surface ofthe chamber 5 in any position of the pivoted movement of the member about either of its axes of oscillatory and is closely but, rotatably fitted" therewith, whereby the member forms a' partition for chamber 5 and in any of its positions divides the spherical chamber 5 into two nearly hemispherical chambers on opposite sides of the member. V

The construction is such that the member 11 must revolve with the member 7 and shaft 6 as will be apparent from Fig. l and must likewise revolve with the member 10 and shaft 9 as will be apparent from Fig. 2, whereby the several members consisting of shaft 6, members 7, 11 and i must all revolve together. The position of the parts at a certain point in their revolu-' t1on, which may for the present purpose be considered 'a point .of zero revolution, is shown in Figs. 3- and 3, Fig. 3? being as prevlously explained a transverse section along line aa. of Fig. 3, showing the parts in the same position of revolution but from a view point 90 removed. It will be seen I a reference to 3 that the construction is such that four separate and distinct chambers are formed by the members 7, 11 and 10 and the housing 1, the chambers being denoted by the numerals 12, 13, 14 and 15. During the rotation of the members, the chambers 12,13, 14 and 15 change greatly in volume,-being alternately caused to expand and contract by reason of the different relative positions of the parts. the chamber 12 is in a pos t1on of maximum volume-and chamber 13 is 1n a position of minimum volume while shows that chamber 14 is at the same time in a position of inter- 4 and 4, the chamber :12I-ha's' contracted to' an intermediate volume and'chamber 13 has mediate volume as is likewise the chamber 15. As the parts are revolved 90 from the position shown in Fig. 3 in thedirection-of the arrow to the position.. 's hown in Figsexpanded to an intermediate volume as tion shown in Figs. 3 and 10 and shaft 9 shown in Fig. 4 while the chamber 14 has contracted/to a minimum volume and the chamber 15 has expanded to a maximum volume as shown in Fig. 4. As the parts are rotated from the position shown in'Figs. 4: and 4: through an angle of 90 in the direction of the arrow' c-hamber 12 has contracted -to a minimum volume, the chamber 13 has expanded to a maximum volume, the chamber 14 has exto the position shown in Figs.5 and 5, it. wilhbe seen that the panded to intermediate volume and chamher 15 has contracted to volume. a

As the parts are rotated from the position 'shown 'in Figs. 5 and 5 through: an angle of in the direction of the arrow to the position shown in 6 and 6, the chambers-12 and 13 have respectively expanded and contracted to intermediate volume. the chamber l l has contracted to minimum volume and chamber 15 has expandedIto maximum volume. As the parts are rotated from the position shown in Figs. 6 and 6* through an angle of 90 in the direction of the arrow to complete one revolution and to arrive again at the starting posi- 3, it will be seen that the chamber'12has expanded to maximum volume, the chamber 13 has contracted to minimum volume, the chamber 14 has expanded to an intermediate volume and chamber 15 has contracted to an intermediate volume. Thus it will be seen that during a single revolution of the. rotatable elements each'of the chambers l2, l3. bland 15 will -pass through all the successive stages of expansion and contraction to maximum and minimum volume. V

On the one side of the plane common to the axes of the shafts 6 and9, are a plurality of orts or openings 17 and 18 and on the other side oftlie same plane are a plurality of orts"'or openings 19 and 20.

n inspectlon of the various figures Wlll show that during the revolution of the parts in the direction of the arrows shown in the several views,-the rotation of member 7 will cause port 17 to be closed away from the chamber 12 at the instantthat the chamber reaches its maximum volume as shown in Fig. 3 and again when the chamberreaches its minimum volume as shown in Fig. 5. Owing to the position and form of port 17 and of the projecting portion 7 of member 7, during the contraction of the chamber 12 from the maximum volume shown in Fig. 3 to the minimum volume shown in Fig. 5, the rotation of the parts causes the port 17 intermediate to be uncovered to communicate with the chamber, the uncovered area of the ,port gradually increasing from a minimumimmediately following the position of rotation shown in Fig. 3 to a maximum uncovered position shown in area when the parts are in the chamber 12 and remains in communication therewith until the chamber has passed through its movement of expansion and again reached the position shown in Fig. 3, at which time the chamber 12 is again closed from the port 19 and will immediately thereafter be again in communication with the port 17. Thus when the parts are revolved in the direction of the arrows the chamber 12 is at all times during its contraction, in

- communication with port 17 and at all times during its expansion-in communication with port 19 and if fluid is supplied to the port 19, such fluid will be received into the chamber during chamber expansion and will thereafter be discharged through the port 17 during chamber contract-ion.

It is apparent that similarly the chamber 13 will also receive fluid from the port- 19 and deliver it through port 17. the arrangement of' chambers 12 and 13 being such that the one chamber is expanding and in communication with the supply port while the other 1s contracting and in communication with the delivery port. It is also apparent that the chambers 14 and 15 will similarly alternately receive fluid from the port 20 and deliver it to the port 18.

It has thus far been assumed for purposes of explanation that the rotation is in the direction of the arrows shown in Figs. 3, 4, 5 and 6. but if the direction of rotation is reversed the former periods of expansion and contraction are likewise reversed, whereby fluid supplied to the ports 17 and 18 is delivered to the ports 19 and 20, the flow of fluid thus corresponding to the direction of rotation of the parts.

If power is applied to the pulley 8 for rotation of the parts and fluid is supplied to the proper ports, fluid under pressure will be expelled from the other ports, the device then functioning as a pump. through which fluid may be moved in either direction according to the direction of rotation of the pulley.

-If fluid under pressure is supplied to the proper ports the parts will be caused to rotate, discharging fluid from the other ports, and power may be drawn from pulley 8 to operate other mechanism, the device then functioning as a motor. which may be caused to rotate in either direction according to the choice of ports (to which the fluid under pressure is supplied and since there is at all times at least one chamber in a position to receive fluid the device when used as a motor has no dead center.

Thus far nothing has been said of the rate at 'which the various alternately expanding and contracting chambers are caused to change in volume. It can be shown that, by the relationship of parts shown the rate of change is practically zero when the ports are closed to. the chambers and reaches a maximum at a point half way between maximum and minimum chamber volume, and when the ports are fully open and least restrictive of fluid flow.

In Fig. 7 is shown a curve substantially corresponding to the variation in volume of the chamber 13 during the revolution of the parts as shown in Figs. 3. 4. 5 and 6 assuming a uniform angular vclocity'for the shaft 6. It is apparent that each of the other chambers will similarly expand and contract during any revolution of uniform angular velocity of shaft 6.

The construction is such that there are at all times two of the chambers expanding and two contracting. It can be slijown that the rates of expansion and contraction are. by the arrangement of arts disclosed such that although the rate 0 fluid flow in or out of any particular chamber varies over a wide range, yet the movement of fluid through the device is at a substantially constant rate. The rate at which fluid will be delivered from and received by' the combined chambers lines 'above or below the horizontal zero line. the displacement of a-line below the horizontal zero line indicating an ex: panding or receptive condition of the chamber while a displacement of a line above the horizontal zero line indicates a contracting or expulsive condition of the chamber. The amount of such displacement is in Fig. 8 proportional to the rate at which fluid is entering or leaving the chamber at the various points of revolution, difierent points in the revolution being indicated by displacement of the line from left to right. It will be seen that from 0 to 180 chambers 13 and 15 arc'expanding and chambers '12 and 14 are contracting while from 180 to 360 chambers 12 and 14 are expanding while chambers 13 and 15 are contracting. Atlthe instantaneous position shown in F igs'. 3 and 3, which is represented by 0 of rotation,-

it will be seen that the chamber 14 is delivering at maximum volume, and chamber 12 has just changed from a condition of re. ceiving to delivering of fluid. As; the revolution proceeds to the 90 point shown in Figs. 4 and 4* the volume of flow from chamber 14 diminishes but that from chamber 12 increases in the same degree to maintain a substantially constant volume of firrid movement. At the position coresponding to o vided for t the vertical line marked 4, for instance, the volume of delive from chamber 14 is represented by the istance ab while the volume of flow from chamber 12 at the same point of revolution is represented by the distance as, and 'tl distance ac, the distance be beingiequal to v the distance ac. It' is apparent rom the diagram that at any other point in the revolution the sum of t e volume or rate of flow fromthe two contracting chambers is also ,"substantially equal to the distance ac". Similarly the combined volume or rate of flow to the two chambers 13 and at the distance (1d, revolution two expanding chambers is -ly equal to the distance apparent that the combined inflow and the combined outflow are at all Thus the fluid flow through the device 1s maintained at a substantially evenrate equal tothe maximum low through any single chamber. The advantage of a constant fluid flow when the device is used as a pump is apparent, and when used" as a motor it is also of great advantage for a variety of reasons, among which it may be mentioned that, being in a condition to receive a constant flow of fluid in any position, there is ,no dead center, nor any position in which the parts may come to rest, in which the starting torque is substantially less than in other positions.

In t e foregoing explanation of the action of the device, it has been assumed for convenience that the fluid is substantially incompressible, as for instance a liquid. has also been assumed for convenience that a uniform angular velocity of the members 7 results in a uniform angular velocity of the members 10 and 11. Owing to the angularity of shafts 6 and 9 this is strictly true only at fourpoints spaced 90 apart in the revolution of the members, but for shaft. angularity of the amount shown in the drawings or less, the variation of members 10 and 11 from uniform angular velocity is negligible, and in the 0 eration of the device it a pears that any di erence caused thereby'in the rate of flow through one of the chambers is probably compensated by an equal, but opposite variation in another chamber.

The opening into the chamber 5 to permit entry of shaft 9 is effectually sealed by providing a close fitting cover plate 21 fastened by the means of screws or bolts such so as bolt 22 and where the shaft 6 projects from the housing packing means 0 we known form is provided as at 22. Thus the housing is effectually scaled against passage of fluid except where ports are proe purpose explained. The ports and at any other oint 1n the the combined rate 0 flow to the also substantialpoint of revolution marked 4 is equal to the ad It will also be' re two together by the:

times equal.)

17 and 18, being always of like purpose whether to deliver or to receive fluid, both communicate into a single port 18* and into a suitable passageway in a fitting or member 23 closely fitted to the housing and held 70 in place by suitable bolts such as bolt 24. The ports 19 and 20 being always of like purpose both communicate into a single port '20 and into a suitable passageway in a fitting or member similarly fixed on the housing. 7 he fittings 23 and 25 are provided with threaded bores 23 and 25 'for the purpose of receiving pipes adapted to'- receive and deliver fluid. v i

It will be noted that the members 7 and 8 10 are free for axial movement away from the oscillatory member 11, there bein no pivot pins connecting the members. guch movement is limited by the interior housing surface, and the'thrusts set up by the oscillatory movement tend to move the adjacentsurfaces. of members 7 and 10 and the housing into close relation. This is of particular advantage in that it efiectually prevents leakage from the one port other between such adjacent surfaces. It has been found that'the device should be constructed so that the angle formed between the intersecting axes of members 7 and 10 is substantially less than 45 degrees. An angle of45 degrees sets up enormous friction losses between the members 7, 10 and 11, and very heavy thrusts between the adjacent member and housing surfaces, causing rapid wear and consequent leakage. Any leakage constitutes a power loss and even with an angle substantially .less than 4.5 degrees, it has been found to be a material improvement to split the housing along a line transverse to the intersecting axes of members 7 an B'y such construction a predetermined amount of material may be removed from: the adjacent surfaces of the separable'housingmembers to compensate for wear between the moving members or for original fitting of the parts to avoid leakage. An angle less than 45 degrees also permits material improvement in the matter of arranging the ports for ample .fluid capacity to avoid power loss and to be 1 o ened and closed by the revolution of t e members, and in providing improved strength and rigidity in the oscillating member and improved pivots for the oscillating movements. 1 It will be apparent that in the light of this disclosure a variety of modified but equivalent structures may be constructed by those familiarwith the art, each of which it is desired to reserve to the inventor by Letters 1 1 Patent if within the spirit and scopeof the following claims.-.

1. A; device of the nature disclosed prising a housing hailing interior wall surto the 1 plane and said'members being surface portions of-a sphere, a plurality of members rotatable therein about different axes in a common plane and intersecting at the center of said sphere, a'inember positioned between the other members for rotation therewith and pivoted for oscillation relative thereto about different axesrespec- Lively and intersecting at the center of said sphere; whereby chambers are formed within said housing and alternately expanding and contracting during rotation of said menihers, said housing providing ports respectivcly positioned on opposite sides of said formed to lose the'one port from the other, said other anenibers being free for axial movement fit) away from the intermediate member whereby thrusts set up by mcnt thereof may cause adjacent surfaces of said other members and the interior housing wall to fit closely together during rotation to substantially prevent fluid leakage: from one to the other of said ports between said adjacent surfaces, the intersecting axes of said other members forming an angle substantially less than 4L5 degrees whereby to limit the pressure between said adjacent surfaces 2. A device of the nature disclosed comprising a housing having interior wall surfaces substantiallycorresponding to surface portions of a sphere, a plurality of members rotatable therein about different axes intersecting at the center of said sphere, a member positioned between the other members for rotation therewith and pivoted therewith for oscillation about different axes respectively and intersecting at the center of said sphere, whereby chambers are formed within said housing and alternately expanding and contracting during rotation of said members, said housing providing inlet and outlet ports for said chambers and spaced apart, said other members being free for axial movement away from said intermediate member whereby thrusts set up during oscillatory movement of the intermediate member may cause adjacent -surfaces of other members and the interior wall of said housing to fit closely together during operation to substantially prevent passage of fluid from one to the other of said ports between said adjacent surfaces.

3. A device of the nature disclosed comprising a housing havin interior wall surface portions substantially corresponding to surface portions of a sphere, a" plurality of members spaced apart and rotatable in said housing about different axes intersecting at the center of said sphere, an intermediate .memb'er rotatable in said housing and pivoted with the other members for oscillation relative thereto about different axes respectively vertical to' the axes of the respective other members and intersecting "plurality of chambers are the oscillatory move-f of said sphere, whereby a formed and alternately expanding and contracting during rotation of said members, said other memat the center hers constituting thrust elements for the oscillation of said intermediate member, and one. of theanglcs"formed by the intersecting axes of said other members being substantially less than 45 degrees, whereby to limit such thrust.

4. A device of the nature disclosed comprising a housing having interior wall surface portions substantially corresponding to surface portions of a sphere, a plurality of members spaced apart and rotatable in said housing aboutdifl'erent axes in :1' common plane and intersecting at the center of said sphere to form angles one of which is substantially less than 45 degrees, a member disposed between said other members for rotation and pivoted therewith for oscillation about different axes respectively and intersecting' at the center of said sphere, whereby chambers are formed within said housing and alternately expanding and contracting during rotation of said members, said housing providing opposite'sides of 'said plane, and said members being formed to alternately cover and uncover each of said port openings during rotation.

5. A device of the nature disclosed comprising a housing having interior wall surfaces complementary to the surface of. a sphere, a plurality of members spaced apart and rotatable within s'aid'housing about different axes, a member positioned between the other -members for rotation therewith and pivoted for oscillation relative thereto about different axes respectively and intersecting at the center of said sphere, whereby chambers are formed within said housing and alternately expandin and contracting during rotation, said mem ers being free for relative movement along the axes of rotation, and said housing constituting means limiting such axiat movement.

6. A device of the nature disclosed comprising. a housing providing a spherical chamber, a plura ity of members spaced apart within said chamber and supported prising a housing, a plurality of parts spaced port openings respectively on i apart for rotation therein respectively about different axes intersecting in a common plane, a part rotatably positioned between other parts to limit such the other parts and oscillatable relative thereto about difierent axes respe'ctively; whereby chambers alternately expanding and contracting are formed within said housing durin rotation of said parts, said housing provi mg-ports respectively on opposite sides of said plane and alternately brought into communication with said chambers by the rotation of said parts, said plu- 'rality of parts being axially movable away from the oscillatory part and said housing providing surfaces adjacent surfaces of said axial movement,

whereby the thrusts set u of the one part moves sai by the oscillation adjacent surfaces closely together to avoid leakage of fluid from the one port to the other between said 20 adjacent surfaces, said intersecting axes forming an angle substantially less than 15 degrees whereby to'lim-it said thrusts, and said housing comprising a plurality. of members separately joined along surfaces transverse to both said intersecting axes v whereby to provide means for adjustment compensating for Wear of said adjacent surfaces.

'In witness whereof I hereto afiix my sig- 3.

nature.

" EDWARD J. KEARNEY.

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